Re: Suggested clockspeed/taiclockd invocation at boot

Darren Spruell <[email protected]> wrote:
> I'm hoping to find an effective and easy solution by which I can cause
> my servers to snyc their clocks against a master taiclockd server on
> the LAN at startup. Preferably, this would be something that runs
> through daemontools' /service setup, if possible.

/service is for things that run continuously, not just at startup.

You want to have clockspeed running continuously; create a service
whose run script simply exec's clockspeed.  On the master, you also
want to publish the clock; create a service whose run script simply
execs taiclockd.

clockspeed will not do any network communication; the clients will
have to also be configured to run taiclock and feed the result to
clockspeed via /usr/local/clockspeed/adjust.  At boot, you might (or
might not) want to jump the clock into sync by feeding the taiclock
output to clockadd.

> The problem I'm facing is this: following the directions in INSTALL, I
> have to feed clockspeed a series of adjustments involving a process up
> to several months in length, for high accuracy. Upon system reboot, am
> I going to have to start this process over again?

No.  clockspeed remembers your clock skew in
/usr/local/clockspeed/etc/atto.  However, you will still want to get
occasional adjustments from the master for the slaves.  That's what
taiclock and taickockd are for.


paul